Photocopying – Contact printing – Light boxes
Patent
1993-12-10
1996-01-02
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
219216, G03G 1520
Patent
active
054813492
ABSTRACT:
An electrophotographic image fixing device having preventing offsetting and affording images of high quality is provided. The electrophotographic image fixing device has a heating roller 1, made up of a mandrel 5 and an elastic layer 4 of 40-60.degree. in hardness, as measured by a spring type hardness meter of JIS K6301, provided on the mandrel, and a pressure roller 2, arranged in contact with the heating roller 1 and having a surface layer 6 the hardness of which is equal to or higher than the hardness of the elastic layer 4 of the heating roller 1. A heater 8 is provided for heating and fusion-depositing a toner image onto a toner substrate 3, by passing through the nip portion between the two rollers the toner substrate 3 on which the toner image has been formed. The linear speed of the surface of the pressure roller is 1.005-1.05 times that of the surface of the heating roller.
REFERENCES:
patent: 4702964 (1987-10-01), Hirano et al.
patent: 4967237 (1990-10-01), Sasaki et al.
Kitagishi Tomoji
Oikawa Akiko
Onose Katsuyoshi
Satoh Toshiya
Yagi Keijiro
Hitachi , Ltd.
Pendegrass Joan H.
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